Global Patent Index - EP 1058813 A1

EP 1058813 A1 20001213 - INTERFEROMETER AND METHOD FOR MEASURING THE REFRACTIVE INDEX AND OPTICAL PATH LENGTH EFFECTS OF AIR

Title (en)

INTERFEROMETER AND METHOD FOR MEASURING THE REFRACTIVE INDEX AND OPTICAL PATH LENGTH EFFECTS OF AIR

Title (de)

INTERFEROMETER UND VERFAHREN ZUR MESSUNG VON BRECHUNGSINDEX UND EFFEKTEN DER OPTISCHEN WEGLÄNGE IN LUFT

Title (fr)

INTERFEROMETRE ET PROCEDE DE MESURE DE L'INDICE DE REFRACTION DE L'AIR ET DES EFFETS DE L'AIR SUR LA LONGUEUR DU TRAJET OPTIQUE

Publication

EP 1058813 A1 20001213 (EN)

Application

EP 99934335 A 19990218

Priority

  • US 9903554 W 19990218
  • US 7558698 P 19980223
  • US 7825498 A 19980513

Abstract (en)

[origin: WO9942787A1] A method and apparatus for measuring fluctuations in the refractive index of a gas, such as air, in measurement path (298) comprising light sources (1) for providing two light beams (9, 10) with different wavelengths along the measurement path (298) of an interferometer (260) which are substantially harmonically related to each other and the output beams (103, 104) of the detectors (85, 86) are electronically processed by an electronic processor.

IPC 1-7

G01B 9/02

IPC 8 full level

G01B 9/02 (2006.01); G01J 9/02 (2006.01); G01N 21/45 (2006.01)

CPC (source: EP)

G01B 9/02002 (2013.01); G01B 9/02007 (2013.01); G01B 9/02027 (2013.01); G01B 9/02083 (2013.01); G01B 2290/60 (2013.01); G01B 2290/70 (2013.01)

Designated contracting state (EPC)

DE NL

DOCDB simple family (publication)

WO 9942787 A1 19990826; EP 1058813 A1 20001213; EP 1058813 A4 20020717; EP 1058813 B1 20121010; JP 2002504671 A 20020212; JP 3332367 B2 20021007; KR 20010041209 A 20010515; TW 382652 B 20000221; US 6327039 B1 20011204

DOCDB simple family (application)

US 9903554 W 19990218; EP 99934335 A 19990218; JP 2000532684 A 19990218; KR 20007009290 A 20000823; TW 88102683 A 19990223; US 25226699 A 19990218